14 bolt swap on a suburban

Discussion in 'Differential & Driveline' started by 00SuburbanBuild, Nov 5, 2019.

  1. 00SuburbanBuild

    00SuburbanBuild New Member

    Nov 5, 2019
    How hard is it to covert a 14 bolt leaf spring axle to coil spring? My 2000 suburban is coil spring and the 14 bolt is 2005 suburban 2500 leaf spring axle. Would I still be able to use standardized lift kits if I chopped the spring perches off my 10 and welded them to the 14
  2. lazz

    lazz New Member

    Nov 13, 2019
    Depends on which 14 bolt we are talking about, working on and what it came out of. Theres a 14Bolt 9.5" SF, 14 bolt 10.5" FF early, Mid and late design, 14 bolt FF AAM 11.5 and 14 bolt FF AAM 11.8. Main differences is housing or center section offset and pinion position being either high or low,pinion yoke mounting length, tube diameter and WMS measurements. Assuming the differential has the same WMS width, pinion height and offset and tube diameter you cut the spring perches off and the spring mounting plates off the original, tack weld brackets on new Diff and measure drive angle @ pre-sprung suspension heigth and centered housing in frame. When all looks good weld away. Be fore-warned though. If the backets are HSS, UHS, UHSLA steel they cannot be reused as heat from welding weakens them and will fail. New ones will have to be fabricated or bought. As far as lift kits are concerned once you modify rear suspensions its a hit and miss on whether they will work as most lift kits are designed around OEM Specs and would require some custom fab. work to make it work.